Which recommendation algorithm technique was pioneered by Amazon's book recommendation system in the late 1990s and revolutionized how online bookstores suggest titles to readers?

The world of literature has been transformed by digital recommendation systems. Major online bookstores and reading platforms use sophisticated algorithms to suggest your next great read. These systems analyze your reading history, browsing patterns, and the preferences of similar readers to curate personalized book recommendations. But how well do you understand the technology that's reshaping how we discover books? Test your knowledge about the algorithmic side of literary discovery!

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Collaborative filtering
Neural language processing
Contextual bandits
Sentiment analysis clustering